The Starrett KDC13021 is a comprehensive 16-piece hole saw set engineered for professional tradespeople working across multiple materials. This deep cut bi-metal hole saw kit combines an aggressive tooth form with cobalt-enhanced HSS teeth, delivering superior heat and wear resistance for demanding applications in metals, wood, plastic, plaster and other materials. Featuring an extended 51mm cutting depth—10mm deeper than standard hole saws—this set excels when cutting through thick-walled tubes or solid materials exceeding 3mm thickness. The increased depth allows you to cut through both sides of pipework in a single operation, significantly improving productivity on plumbing and mechanical installations. The variable 4-6 teeth per inch configuration provides aggressive material penetration whilst maintaining excellent kerf clearance, reducing binding and heat build-up during operation. This design also minimises vibration for smoother cutting action, reducing user fatigue during extended use. The kit includes 13 deep cut hole saws ranging from 20mm to 76mm, plus two extended-length arbors (A1E and A2E) and an ejector spring, providing complete flexibility for a wide range of drilling diameters. Ideal for electricians installing conduit and cable access points, plumbers working with thick-walled pipework, and general contractors requiring versatile hole cutting capabilities across various substrates. Features and Benefits: • Extended 51mm cutting depth for thick materials and double-wall tube penetration • Cobalt-enhanced HSS teeth deliver superior heat and wear resistance for longer tool life • Variable 4-6 TPI tooth configuration provides aggressive cutting with reduced vibration • Comprehensive 13-piece hole saw selection from 20mm to 76mm diameters • Complete kit includes extended arbors and ejector spring for immediate use • Suitable for metals, wood, plastic, plaster and composite materials Specifications Pieces in Kit: 16 Cutting Depth metric: 51mm Cutting Depth imperial: 2" Teeth per Inch (25mm): 4-6 Teeth Type: HSS Country of Origin: CN Kit Contents metric: Deep cut hole saw sizes 20, 22, 25, 29, 32, 35, 38, 44, 51, 57, 64, 68, & 76mm; Arbors A1E & A2E; Ejector spring A7 Kit Contents Imperial: Deep cut hole saw sizes 25/32, 7/8, 1, 1 1/8, 1 1/4, 1 3/8, 1 1/2, 1 3/4, 2, 2 1/4, 2 1/2, 2 11/16, & 3"; Arbors A1E & A2E; Ejector spring A7
